Commit automatic isogun migration changes (#516)

Author: dylanahsmith

dev.yml

@@ -6,7 +6,7 @@ up:
         or:        [mysql@5.7]
         conflicts: [mysql-connector-c, mysql, mysql-client]
   - ruby: 2.7.2
-  - railgun
+  - isogun
   - bundler
 
 env:

railgun.yml isogun.ymlrailgun.yml renamed to isogun.yml

@@ -2,14 +2,10 @@
 name: identity-cache
 
 vm:
-  image:      /opt/dev/misc/railgun-images/default
   ip_address: 192.168.64.98
   memory:     1G
   cores:      2
 
-volumes:
-  root: 1G
-
 services:
   - mysql
   - memcached